Kev ua tau zoo ntawm cov kav dej sib xyaw

Kub thiab Siab Ua Haujlwm: Tus qauv tsim ua haujlwm siab ntawm cov kav dej thermoplastic dej ntawm 20℃feem ntau yog hais txog lub siab-cov kabmob muaj peev xwm ntawm cov kav dej yas siv los thauj cov nruab nrab. Tus nqi no feem ntau yog siv los ua cov txheej txheem xaiv thaum xaiv cov kav dej txias. Txawm li cas los xij, raws li qhov ntsuas kub ntawm qhov nruab nrab kis tau nce thiab lub neej kev pab cuam ntawm cov kav dej yas yas nce, nws lub siab - cov kabmob muaj peev xwm yuav maj mam txo. Yog li ntawd, thaum xaiv cov kav dej thermoplastic rau cov dej kub, lawv qhov ntev - lub sij hawm siab - bearing peev xwm ntawm cov dej kub kub yuav tsum raug xam raws li qhov kev xaiv. Cov kav dej sib xyaw tseem tseem ua raws li cov khoom siv thermoplastic, nrog rau cov khoom siv hlau ua kom lawv cov rigidity, tensile lub zog, cuam tshuam tsis kam, thiab kev txhawb nqa nruj. Txawm li cas los xij, cov khoom sib txawv hloov pauv cov yeeb nkab lub siab-cov kabmob muaj peev xwm; Yog li ntawd, cov kav dej sib xyaw yuav tsum tau xaiv sib txawv rau kev thauj cov dej txias thiab dej kub.

Linear Expansion Coefficient: Muaj qhov sib txawv tseem ceeb hauv kev nthuav dav (m / m degree) ntawm cov kav dej yas thiab hlau. Lub linear expansion coefficient ntawm cov kav dej yas yog loj dua li cov hlau. Nws cov kab deformation feem ntau yog tshwm sim nyob rau hauv axial expansion thiab kab rov tav khoov ntawm cov yeeb nkab, thiab nws expansion yog ncaj qha proportional rau qhov kub thiab txias sib txawv. Vim hais tias kev nthuav dav ntawm cov kav dej sib xyaw yog txwv los ntawm cov hlau, cov coefficient ntawm linear expansion yog txo qis. Txawm li cas los xij, yog tias qhov kev sib txuas ntawm cov hlau thiab cov khoom yas tsis nruj, qhov tsis sib xws ntawm thermal expansion thiab contraction tuaj yeem ua rau tev thiab delamination, cuam tshuam rau tag nrho cov kev ua tau zoo ntawm cov yeeb nkab sib xyaw thiab txo nws lub zog thiab siab ua haujlwm. Qhov no yog qhov teeb meem tseem ceeb uas yuav tsum tau xav txog hauv kev tsim cov kav dej sib xyaw.

Txheej Txheej: Kev saib xyuas txaus yuav tsum tau them rau cov hauv qab no thaum tsim thiab teeb tsa: Rau kev nthuav tawm lossis tsis yog - faus zais kev teeb tsa, thaum qhov ncaj- kab nrug tshaj 20m, kev nthuav dav pob qij txha lossis cov txheej txheem kev them nyiaj lub kaum ntse ntse yuav tsum tau txiav txim siab. Txawm li cas los xij, nws yuav tsum tau muab sau tseg tias txawm hais tias cov linear expansion coefficient ntawm cov kav dej yas yog ob peb mus rau kaum tawm lub sij hawm ntawm cov kav hlau, nws qhov kev nthuav dav tsuas yog ib feem ntawm cov kav hlau, thiab nws kuj muaj kev tiv thaiv zoo rau deformation. Yog li ntawd, rau cov kav dej uas tau zais hauv chav dej lossis hauv pem teb hauv tsev, qhov kev nthuav dav ntawm cov yeeb nkab yas yog txwv los ntawm kev sib txhuam ntawm cov cement mortar, uas ua rau nkag mus thiab tiv thaiv cov cement sab nraud los ntawm kev tawg. Yog li, cov kav dej faib cov kav dej tuaj yeem ntsia tau siv cov txheej txheem ib txwm muaj lossis nrog qhov chaw tsim nyog.

Thermal conductivity: Lub thermal conductivity ntawm cov kav dej yas (w / cm·K) yog kwv yees li 1/100 ntawm cov hlau thiab 1/1000 ntawm tooj liab, txhais tau tias cov kav dej yas inherently muaj cov thermal rwb thaiv tsev zoo heev. Hauv cov xwm txheej uas muaj peev txheej tsawg, kev rwb thaiv tsev yuav tsis tsim nyog. Txawm li cas los xij, cov kev cai tam sim no rau cov kav dej kub yas tseem suav nrog qee qhov kev xav tau rau kev rwb thaiv tsev. Piv txwv li, cov kav dej tseem ceeb, cov kav dej xa rov qab, thiab cov kav dej ntawm lub ru tsev thiab sab nraum zoov uas yuav khov yuav tsum muaj kev rwb thaiv tsev, thaum cov kav dej faib cov kav dej hauv cov phab ntsa lossis cov plag tsev tsis tas yuav xav txog. Cov txheej txheem rwb thaiv tsev rau cov kav dej yas muaj xws li PVC / NBR kaw- xov tooj ntawm tes roj hmab- cov kav dej yas sib xyaw, siab -foaming polyethylene (PE) kaw-cov kav dej ntawm tes, cov kav dej polyurethane ua npuas ncauj, thiab ntawm -site sprayed polyurethane polyester foaming agent.

Dej Rauj Resistance

Vim muaj kev hloov pauv ntawm phab ntsa tuab, qhov hnyav, tus nqi ntws, thiab cov yeeb nkab txoj kab uas hla ntawm cov khoom siv sib txawv, txawm tias nyob rau hauv tib lub siab tsis kam, kub tsis kam, thiab lub zog xav tau, qhov sib txawv ntawm cov yeeb nkab phab ntsa thickness yuav ua rau muaj kev hloov pauv hauv cov dej rauj, cov yeeb nkab sab hauv, thiab hydraulic tej yam kev mob. Feem ntau, nyias nyias- cov kav dej uas muaj cov kav dej txuag cov khoom siv, muaj cov kab uas loj dua sab hauv, zoo dua hydraulic tej yam kev mob, sib dua, thiab yooj yim rau nruab. Cov khoom siv yeeb nkab sib txawv muaj qhov sib txawv ntawm qhov sib txawv vim qhov txawv ntawm cov txheej txheem tsim khoom, cov nqi tsim khoom, thiab cov chaw siv; qhov no yuav tsum tau txiav txim siab thaum xaiv cov khoom siv yeeb nkab. Lub elastic modulus (N / cm) thiab phab ntsa thickness cuam tshuam rau cov dej rauj tsis kam ntawm cov khoom siv dej. Kev hloov siab sai sai thaum lub valve qhib thiab kaw ua rau dej rauj, uas tuaj yeem ua rau cov yeeb nkab tawg thiab deformation hauv cov xwm txheej hnyav. Qhov loj ntawm cov dej rauj siab yog muaj feem xyuam rau cov dej rauj yoj tshaj tawm, uas nyob rau hauv lem muaj feem xyuam rau cov elastic modulus, yeeb nkab txoj kab uas hla, thiab phab ntsa thickness ntawm cov yeeb nkab khoom. Tsawg elastic modulus, cov kav dej loj dua, thiab cov phab ntsa nyias nyias tag nrho txo ​​cov dej rauj. Feem ntau, cov dej rauj tsis kam ntawm ntau cov kav dej yas yog qis dua li cov kav hlau.

Tus Nqi Tag Nrho Cov nqi tag nrho yog cuam tshuam los ntawm ntau yam, xws li muaj cov khoom siv, txawm tias lawv yog cov khoom siv hauv tsev lossis tuaj txawv teb chaws, cov yeeb nkab phab ntsa tuab thiab qhov hnyav, cov nqi tsheb thauj mus los, cov yeeb nkab fittings thiab cov khoom siv, cov nqi tsim khoom, thiab cov nqi cia. Feem ntau hais lus, cov kav dej yas thiab cov kav dej sib xyaw yog kim dua li cov kav hlau galvanized. Txawm li cas los xij, tag nrho cov nqi ntawm cov yas thiab cov kav dej sib xyaw tsis tas yuav siab dua li cov kav hlau galvanized.